Bone stresses before and after insertion of two commercially available distal ulnar implants using finite element analysis

Our study only examined stresses

Rebecca L. Austman

2011

Scholarcy highlights

  • Disorders of the distal radioulnar joint, such as arthritis, may be associated with pain, weakness, instability, and loss of forearm rotation
  • As the understanding of the biomechanics and load transfer characteristics of the DRUJ increases and improved implant designs with long-term follow-up studies become available, prosthetic replacement is likely to become the standard of care for managing the arthritic DRUJ
  • Implant design can greatly affect how load is transferred to the surrounding bone, which in turn can affect the degree of stress shielding, possibly affecting the implant’s lifespan
  • Studies investigating load transfer in the ulna and the role played by implant design characteristics should prove useful in predicting and improving the success of these implants
  • The length and diameter of the implant stems inserted were similar; the Wright implant stem is manufactured from titanium, which has an elastic modulus that is about half of the SBI implant’s cobalt chrome stem
  • Models run with the SBI stem set as titanium showed that this factor alone accounted for most of the differences in bone stresses
  • Our results suggest that for the loading situation and parameters investigated the titanium stemmed Wright implant may result in less stress shielding than the cobalt chrome SBI implant

Need more features? Save interactive summary cards to your Scholarcy Library.